Perfecting-machine.



H. STAMM. PBRFEOTING' MACHINE. APPLIOATION FILED APB. 19,1907.

Patented Oct. 18; 1910.

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H. STAMM.

PEEPEGTING MAOHINE. APPLICATION FILED APE.19,1907.

Patented Oct. 18, 1910.

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HENRY STAMM, OF RENTZSCHMIIHLE, NEAR GREIZ, GERMANY.

PERFECTING-MACHINE.

Application filed April 19, 1907.

To all whom it may concern:

Be it known that I, HENRY STAMM, a subject of the Emperor of Germany, residing at Rentzschmiihle, near Greiz, Germany, have invented certain new and useful Improvements in Perfecting-Machines, of which the following is a specification.

This invention relates to perfecting machines and it has for its object among others to provide a machine of this character hav ing increased capacity accomplished by a better proportion of the paper-length printed upon to the length of the carriage-way. This proportion generally is about 1 :4; 2'. c. if the sheet to be printed upon has a length of one meter, the form goes a distance of four meters for every printed sheet (two meters to and fro). By this invention the proportion is about 1 :2 if the machine is driven by a crank-brace and about 1 :26 if by a mangle rack.

A further essential advantage of the present invention is that the improved mechanical efl'ect is not attained by oscillating impression cylinders but by cylinders which continually turn in the same direction. These latter are more easily fed with the paper and are better qualified for different sizes. The offsetting is avoided by improved. means without the application of anti-offsetting paper or other auxiliary means, as for example paraffin rollers.

In the drawings Figure 1 shows a form of embodiment which is arranged for the above new anti-offsetting process. Figs. 2 to S) show eight different successive positions of the machine according to Fig. 1, giving every position of the sheets moving through the machine.

The carriage a is moved to and fro as is usual in printing machines. The same carries two first impression forms I), b and two forms c, c (which produce the second impression or which perfect) which are inked by groups of rollers g, h, 2', 7c and always one form I) or c at the left hand is inked by the groups of rollers g or 2' given in the drawing on the left of the impression cylinders, the other forms by the groups of rollers h or is situated on the right side of the impression cylinders, so that only half of the double forms need to go through under the rollers, as is customary with certain one revolution printing machines. In this case the rollers are somewhat raised in the usual manner, while the other form, which is only partly Specification of Letters Patent.

Patented Oct. 18, 1910.

Serial No. 369,187.

inked, runs through, so that they are not brought into contact therewith. It follows from this arrangement that the length of the four forms taken together is nearly equal to the length of travel (to and fro) of the carriage, and as a consequence the entire travel is used to its possibly utmost capacity. The impression cylinder dcooperates only with the type-forms b, b the impression-cylinder 0 only with the typeforms c, c, and the two impression-cylinders turn opposite to each other and always in the same direc tion without interruption.

The supply of roll-paper is arranged like in the feeding of rotary machines for changeable sizes of sheets inasmuch as the endless paper is moved off by traction-rollers t, t, cut in sheets by cutting rollers a, o (in Fig. 1) and the sheets are led in an ordinary way to the impression cylinders cl and e by tapes 16, Fig. 1.

The invention is based on the ascertainment of the proper proportions regarding size and position of the impression and transmission-cylinders. At the same time it was considered, that the crossing of the paper-strips is unavoidable but there is no disorder in the sheets running to and from the impression cylinders. In Figs. 1, and 2 to 9 is shown how the oflsetting is avoided in this connection without the employment of anti-offset paper-rolls.

It is to be emphasized, that the toothed wheels of the impression cylinders always catch into those of the -transmission-cylinders and the latter engage with each other andthat all impression-cylinders like the sheet-conveying-rollers 15 and the coacting rollers are constantly turning in the same direction as is the case with cylinders of rotary printing machines.

The transmissions from the cylinders 71 to g and from y to 6 take place in the usual manner, and a thorough description of the respective contrivances is not necessary inasmuch as they are supposed to be known and in use. The sheet is of double length measured according to the running direction as compared with an ordinary printing machine with equal travel of the carriage, 6. instead of two forms 7), 7) only a single one of nearly the same size could be printed from and inked on the latter, so that the capacity of printing of the press herein described is about double as large as with an ordinary printing machine, and as a consequence the higher working order of the invention in question is proved.

The color of the groups of rollers g and la comes from one of the color-boxes f, at the ends of the machine and for the other groups from a color-box f near the center of the machine. Fig. 1 shows the arrangement of the central color-box, which serves for feeding the inner groups of rollers 71, 2'. In this case the color-box is fastened above the transmission-cylinders p, 9 one of the latter being provided with distributing tables 0, on which the color previously ground by rollers Z, Z is put by the swinging color-transmission-rollers n, in order to be conveyed in a similar manner by one of these transmission cylinders to the inner groups of the rollers h, 2'.

It is evident that the peripheries of the transmission-cylinders p and Q and their mutual position are so arranged, that the length of the way passed by every sheet from the touching point at the type paperforms Z), Z) to the next forms must be exactly equal to an odd number of circuits of the little impression cylinder, if the latter turns twice while running to and fro.

The arrangement for the last named purpose consists in the fact, that printing is effected at the same time on two sheets from two paper rolls in, x of which one is situated on the left, the other on the right side at the ends of the machine, Fig. 1. From each of these paperrolls the paper-strip runs in the first place into one pair of take off rollers t, t, whereupon itis cut by a pair of cutting rollers 10, o and the sheet, thus separated, is always led by tapes 16 around one conveying roller 15 on one side of the first impression cylinder (Z and on the other side to the impression-cylinder e which thereupon supplies the sheet coming from the right side of the machine. The sheet coming from the right paper-roll thus runs in the first place the opposite way of the sheet coming from the left roll. This longer time is required to enable the crossing of the sheets, as is seen by Figs. 2 to 9 and will be described hereafter. At the same time with the sheet issuing from the impression-cylinder on the right side, which sheet is already printed on one side, an entirely new sheet from the paper-roll on the left side gets to the impression-cylinder (Z, Fig. 1, is held fast by the gripper 9 of same, while the aforesaid sheet from the right side, is perfected by cylinder (Z. The new sheet serves in this manner as anti-offsetting sheet for the other one, is held fast during several.

turns of the impression cylinder (Z by the gripper 9, until the forms Z), 7) print same during the next back-movement of the carriage. This is so done, that those places, which had received offset by the previous impression, are thereupon overprinted, and

the offset is made invisible. The impression cylinder (Z is provided for this purpose with two systems of grippers. One system 9 lays hold on the fresh sheet at the touching point of the conveying roller 15, the other system 10 remains opened up to the touching point with the transmission-cylinder p, where it catches the sheet coming from the right impression-cylinder. Now follows the turning of impression-cylinder (Z. After this the sheet is immediately let loose by the grippers 10, while, as said before, the sheet lying under it, is still held for a certain time by the grippers 9. At the same time the delivered perfected sheet is carried by the roller (Z and cylinder p to and is caught again by transmission-cylinder from which the band-transmission 23 receives and forwards it into a folding contrivance arranged at will.

After having served for an anti-offsetting sheet and then having been printed, the sheet coming from the left roll is also forwarded by transmission-cylinders p and g, but does not run however, like the preceding printed sheet into the folding contrivance but is held fast by the gripper 8, Fig. 1, up

to the touching point of transmission-cylinder 9 with the impression cylinder 6 where the grippers l0 catch it, shortly after a new sheet coming from the right roll has been caught by the gripper 9 (situated underneath the grippers 10) at the engaging point of the conveying roller 15, this latter sheet serving the other one as anti-offsetting paper. The process already described thenbegins anew. The new sheetv is held by grippers 9 up to the form 0, 0, while the perfected sheet, having come from the left side of the machine is released by the grippers 10 after the first turning of the cylinder 6 and caught up by gripper 7 of the transmissioncylinder 9 to be likewise received by the band-transmission 23 and to run into the folding conveyances.

As already indicated the process of the sheet running from the right to the left side, after having served for antioffsetting paper and been printed on the first side, differs from the other one in this that having arrived at the impression cylinder (Z, it is not vgripped by same at the first rotation, but only after a whole printing period or after one more full turning of the transmissioncylinder 19.

The special character of the opposite paths traveled by the sheets coming from the left or right side are explained by Figs. 2 to 9 in eight different successive positions.

Fig. 2 shows the central position of the carriage during its travel toward the right side, as indicated by an arrow. (In all figures the arrows are always underneath the forms, that are printed from). Fig. 3 represents the following position of the carriage at the right hand dead point. Fig. 4 the central position of the carriage traveling toward the left. Fig. 5 the position of the carriage at the left dead point and Fig. 6 the central position of the carriage running toward the right.

The position of the single sheets simultaneously running through the machine is given by the numbered lines 1, 2, 3, 4. The broken pointed lines 1 and 4 refer to those sheets coming from the right paper-roll and the full lines 2 and 3 to the sheets coming from the left paper roll.

Figs. 2 to 9 show two positions distant from each other by eight positions, Fig. 2 for the first and ninth, Fig. 3 for the second and tenth and so on, so that the bracketed marks refer to that sheet which after eight further positions is in the same position as the sheet marked without bracket. Hence the sheet 2 is in the first position Fig. 2 in the same state, as sheet 3 in the ninth position and sheet 2 in the eighth position Fig. 9 in the same state as sheet 3 in the 16th position and so on. In the first position Fig. 2, sheet 1 is seen issuing from the right side and is already printed on the one side. Also the unprinted sheet is seen coming from the left side about to run to impression cylinder (Z, while with the other impression cylinder 0 sheet t is about to be fully printed. In Fig. 3 the latter sheet is finished while sheet 1 is being printed together with sheet 3 serving for its anti-offsetting paper. In Fig. 4 the center of these sheets 1 and 3 is at the printing spot, while sheet 4 has just left impression cylinder 6, and its head has already arrived in a serpentine winding above the.

conveying cylinder 79. In Fig. 5 the head of sheet 1 already runs toward the touching or contact point of the two cylinders 79 and q, while its hind-end has just left the form, and the other sheet, lying underneath it has been held on the impression cylinder (Z, in order to be printed at the next backward movement of the forms I), b. In this position sheet 4; completely lies on conveying cylinder 9, while the printing of sheet 2 begins with impression cylinder 6. The simultaneously arrived new sheet in the latter position and from the right side serves sheet 2 as anti-offsetting paper. In Fig. (3 cylinder at is in a raised position, while on the other cylinder the two sheets 2 and 4 are just printing 2'. e. in the central position. In Fig. 7 the backward movement'of the forms and the impression of sheet 3 the one side of which has already been printed, begins while sheet 2 has just been perfected. Sheet 4, which could not be transferred in the fifth position, is as by Fig. 7 about to make a second turning with cylinder 72, to wait till sheet 3 has left impression cylinder cl. Sheet 3 begins leaving it in the following position Fig. 8. In Fig. 9 the sheet 3 has left the impression cylinder (Z by a half length and fully in the ninth position, to which corresponds again Fig. 2, so that in Fig. 2 the way-is open to sheet 1 together with the newly arrived sheet 3, and both like sheets 1 and 3 previously repeat the same operation as described before.

Referring to position Fig. 7 on cylinder q sheet 1 fully printed, is shown going to the folding contrivance whereas the other sheet, just fully printed by impression cylinder 0, immediately follows, to also run to the fold ing contrivance, as is seen by Fig. 9.

The running of sheet 3, the perfecting of which begins in the position after Fig. 7 and is finished in the position Fig. 9 is seen in the ninth Fig. 2, in the tenth Fig. 3 and the eleventh position Fig. 4t; in the latter it gets to the impression cylinder 6 with the new sheet 4 coming from the right side. In Fig. 5 twelfth-position, sheet 3 begins its print with sheet a, which serves as offsetting paper. Sheet 2 is accordingly taken along by impression cylinder (2 just at their first contact, whereas, as previously indicated, the sheets running in the other direction have to make first a complete turning of the conveying cylinder.

As described before the grippers of the impression cylinder catch the new sheet 3 in the position Fig. 2 and do not deliver it, before reaching the position in Fig. 8, so that it remains on the impression cylinder during three turnings. The grippers 8 Fig. 1 then open, and always after the third turning deliver the sheet, the grippers 10 of the next cylinder however deliver it after the first turning.

The opening and shutting of the grippers is effected by known means as for instance by sidewise movement of the gripper eccentrics and by means of particular eccentrics, which sometimes set the grippers out of operation.

If the machine is to be employed for the printing of any si'naller sized paper, with the exception of the velocity of the feeding rollers t, i, no other change is necessary neither with the grippers nor with the cylinders.

If half the capacity is required, the machine is made to work with one form 7) or 0 instead of two forms 5, b or c, 0. In this case two coloring roller-groups of four and likewise the two outside color-boxes or the middle color-box may not be used.

It is indicated in Fig. 1, that the band transmissions for the conveyance of sheets may be so arranged, as to be swinging, so that for the sake of a more convenient handling the impression cylinder may be easily moved aside.

Having thus described my invention what I claim is:

1. In a perfecting machine, the combination with the printing forms of two constantly rotating impression cylinders separated from each other and two transmission cylinders of double the size of the impression cylinders.

2. In a perfecting machine, the combination with the printing forms of two constantly rotating impression cylinders separated from each other, two transmission cvlinders of double the size of the impression cylinders, means for operating said cylinders, and means for holding every unprinted sheet upon such impression cylinder during two impressions.

3. In a perfecting machine, the combination wit-h the printing forms, of two con stantly rotating impression cylinders, separated from each other, two transmission cvlinders of double the size of the impression cylinders, means for operating said cylinders, means for holding every unprinted sheet upon such impression cylinder during two revolutions and means, whereby each sheet serves first as an offset paper to the sheet which has received its first impression and then receives the impression.

4. In a perfecting machine, the combination with the printing forms and right and left color boxes of two constantly rotating impression cylinders, means for actuating the same, means insuring the crossing of the two sheets running opposite to each other,

and means whereby said constantly rotating impression cylinders always cooperate with the printing forms, one of which is inked by the left and the other by the right color box of each of both impression cylinders.

5. In a perfecting machine, the combination with the printing forms and right and left color boxes of two constantly rotating impression cylinders, two transmission cylinders, means for actuating the same, means insuring the crossing of the two sheets running opposite/to cach other, and means whereby said constantly rotating impression 0% always cooperate with the printing forms, one of which is inked by the left and the other by the right color box of each of both impression cylinders, combined with a system of grippers with two point-needle systems to simultaneously hold both sheets on the cylinder and to deliver them at different times.

6. In a perfecting machine, the combination with the printing forms, of two constantly rotating impression cylinders, two transmission cylinders, means for actuating the same, right and left color boxes, means insuring the crossing of the two sheets running opposite to each other, and means whereby said constantly rotating impression cylinders always cooperate with the printing forms, one of which is inked by the left and the other by the right color box of each of both impression cylinders.

7. In a perfecting machine, the combination with the printing forms, of two constantly rotating impression cylinders, right and left color boxes therefor, two transmission cylinders, means for actuating the same, means insuring the crossing of the two sheets running opposite to each other, and means whereby said constantly rotating impression cylinders always cooperate with the printing forms, one of which is inked by the left and the other by the right color box of each of both impression cylinders, combined with a system of grippers with two mecha nisms to simultaneously hold both sheets on the cylinder and to deliver them at different times.

In testimony whereof I aflix my signature.

HENRY STAMM.

In the presence of- JOSEPH AU, HANS NEUER. 

